Equalizer for pump-rods.



R. H. JOHNSON; EQUALIZER PoR PUMP RODS.

` .APPLIOATION'FILED AUG. 25, 1910. 994,928.

Patented June 13, 1911.

IWV'EWTOR mom/EY uni'rnn sfin'rns rai* ivi nieren..

ROBERT. H.y JOHNSON, GEE ANSON, TEXAS.

E-QU'AIZIZER FORV PUlVIPeRODS.'

Specification of Letterslatent.

Applicationledil Aii'giist'25,19.102V Serial No; 578,887.

in equalizersforpump rods, andi one ot the objects thereon istoprovideax device ot this character, which while operatingI toassist inelevating' the columny ot'water in a pump, isY

designed-to sustain the pump rod1 in its fixed posit-ion andt precludeany possibility of the same turningv in aE horizontal plane.

Alnot-henV object ot'the invention isto providean adjustable nlcrum fortheweighted levers, which may,l be;` manipulatedl withouty entirelydismantling the component partsi thereof.'

At further object; ofthe invention is the.

provision` off a' device of this character, which is simple of"construction,thoroughly reliable and etlicientin operation, andinexpensiveA in` manufacture.

With these and other objects in View', the:

vmounted aV clampor bracket, the same oominventionA consists inthe'construction, combination and arrangment of parts aswill be:

hereinafter more fully described, illustrated in the accompanyingdrawings, and pointed out in the claims hereunto appended. Y

In said drawings zfFigurel, is a side elevation illustrating the'application orx my equalizer to a pump rod, which is actuatedi by awind-mill. Fig. 2, is a top plan viewot the adjusting fulcrum. Fig. 3,is a perspective view of the rod clamp.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawings.

Referring to the accompanying drawings, the numeral 2, designates theupper end portion of the well, which is of the ordinary well knownconstruction, and has mounted therein in the usual manner a pump casingor barrel 3, the latter being of the required length and has its upperend rising above the well. Working within the pump casing or barrel 3,is the ordinary pump rod 4 for connection with a wind-mill or otheroperating device, (not shown). Mounted upon the pump rod 4 is a clamp,which comprises a pair of duplicate sections 5, each of which is formedfrom a single piece of metal, with an outwardly arched semi-circularmedial portion 6,. andi laterallyV en tending ears 7,A the same beingupwardly directed to provide bearing.` eyes or lugs S-,fthesemifcircul'ar medial@ portions@ 6: of. thef sectionsbeing adaptedtoenga'gethe pump rod 4.',.by embracing'tliesame andare connected togetherby means of bolt members 9, Wheneby the clamp may be adjusted: anchsecured to.` said. pump rodi at'. any desirable point throughout thelength thereof. Connected between the bearing eyes or llugs- 8- o: theclamp,L are the innen ends of.y swinging weighted levers or arms 1,0,wby means of pivots-1.11, the same being passed through the lugsor eyesS' and said levers or arms-LO, so

Vthat the'l'atter may move in a vertical; plane fora purpose as will be'hereinafter more fully described. Adjustably mounted' upon these leversor arms 1() are weight peas 12 the same carrying the usual set screws113 ler engaging the inflexible levers orV arms 10, wherebysaidweightpeas may befsecured 1in adjusted position onv the latter, for' the'counterbalancing of the pump'rod 41A during the working of thef pumpiUpon the pump casing or barrel 81 is prising duplicate opposedsections-14, each oli whichi is formed from; a single piece of "meta-l,the sections 141beingprovided with youtwardly curved central portions 15to lengage the pump casing or barrel 3, and

withv upwardly curved* supporting arms 16,

Ihaving outturned extremities 17 between 'whi'cl are rotatably mountedanti-friction guide rollers 18, the same being supported upon studjournals 19 having their bearings in the extremities 17. The sections 14are united by means of inner and outer clamping bolts 20 and 21, therollers 18 being peripherally grooved to receive the arms or levers 10,which work therein during the reciprocation of the pump rod on theoperation of the pump.

In operation, it will be seen that when the pump rod 4 moves downwardlythe weighted arms or levers 10 will be lifted and that when said pumprod moves upwardly to elevate the water inthe well, the weighted arms orlevers will descend. Said weight peas 12 therefore assist in elevatingthe water and put a load upon the pump rod upon its downward stroke,thereby counter-balancing the weight of the water and equalizing thestrain upon the wind-mill or operating deiw vice. It Will be observedthat there Will be no lateral strain upon the pump rod 4, and also thatfriction Will be reduced to a minimum. As Will be readily understood,the use of the inflexible bracket with its rollers 18, and the clampcarrying the arms l0, the latter also being inf1eXible,-thereciprocating movement of the pump rod l provides a Weight variation,due to the fact that the rods 10 reciprocate on the rollers 18 (Whichform the fulcrum for the rods), thereby moving the Weights l2 toward andfrom the fulcrum. This variation insures greater possibilities inadjustment to provide for counterbalancing, enabling the operator tovary the Weight during the traverse of the rod' from one extreme ofmovementl to the other, thereby aiding in overcoming unequal pressuresoccurring in the pump operation, as, for instance, the pressure providedWhen the pump-bucket is brought into contact With the Water in the Wellor When it is about to leave the Water, the adjustment of the clampmembers 8 permitting of a proper application of the maximum and minimumcounterbalancing Weights at the proper time. The avoidance of lateralstrain of the pump rod is due particularly to the fact. that the arms 10are inflexible and operates in the peripheral grooves of the rollers 18,the grooves being of sufiicient depth to allow the arms 10 to occupy aposition belovv the perimeter of said rollers to elicaciously resist anyrelative movements of the arms in a horizontal plane. Furthermore, thepump rod 4: Will be caused to reciprocate in a true vertical plane whenin,

operation.

From the foregoing it is thought that the construction and operation ofthe invention Will be clearly understood and therefore a more extendedexplanation has been omitted.

What is claimed is l. In a device of the character described,

the combination With a pump rod, and a pump casing, of a pair ofinflexible arms pivotally connected to said pump rod, adjustable Weightsmounted on said arms, and a bracket carried by the pump casing andhaving a pair of rollers thereon, said rollers being provided Withperipheral grooves Within which said arms freely move.

2. In a device of the character described, the combination With a pumprod, and a pump casing, of a pair of inflexible arms pivotally connectedto said pump rod, adjnstable Weights mounted on said arms, and avbracket carried by the pump casing and having a pair of rollers thereon,said rollers being provided With peripheral grooves Within which saidarms freely move, and the perimeter of the Walls of the groovesextending above the upper side of the arms.

3. Equalizing mechanism for pump rods comprising a support adapted to beadjustably secured to the pump rod, oppositely-eX- tending inflexiblearms, pivotally carried by the support, Weight members adjustable onsaid arms, and a stationary fulcrum member having a fulcrum for eacharm, each arm being freely movable longitudinally on its fulcrum toprovide for Weight variation during the reciprocation of the pump rod.

In testimony whereof I have hereunto set my hand in presence of tvvosubscribing Witnesses.

ROBT. H. JOHNSON. l/Vitnesses:

J. R. GOLDEN, O. LNI. CRENSHAW.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatents, Washington, D. C.

